My current avi shows me doing a little-finger DL with an 8kg/17.6 lbs KB...though, I did it off-centre to show the KB up and it was mostly just for the fun of it, not for any fantastic PB or anything.

I could only handle the small handle circumference of that KB, because of very small hands, and had no loops, so I may have to restest that one with the loops, to see if I can go heavier with the little finger at all...